Finding the Fourth Proportional to 1,185.60, 1,643.76 and 1,116.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.60 : 1,643.76 = 1,116.48 : x
2. Step 2: Convert to fraction form
   1,185.60/1,643.76 = 1,116.48/x
3. Step 3: Cross multiply
   1,185.60x = 1,643.76 × 1,116.48
4. Step 4: Simplify right side
   1,185.60x = 1,835,225.16
5. Step 5: Solve for x
   x = 1,835,225.16/1,185.60
6. Step 6: Final answer
   x = 1,547.93